.div_header {
  width: 100%;
  background: url(../img/banner_contact.jpg) no-repeat;
  background-size: 100% 100%;
  height: 100vh;
  position: relative;
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
li {
  list-style-type: none;
}
a {
  color: #000;
  text-decoration: none;
}
.div_header_div_ul{
  width: 100%;
  display: flex;
  flex: 4;
}
.div_header_div_ul li a {
  color: #fff;
  font-size: 18px;
}
.div_header_div_ul li {
  display: inline;
  margin-left: 2%;
}
.div_header_img {
  display: block;
  margin-top: 5%;
  margin-left: 13%;
}
input {
  outline: none;
  height: 45px;
  width: 300px;
  padding-left: 5px;
  border-radius: 10px;
  border: 0;
}
.div_div_form_btn {
  margin-top: 20px; 
  width: 150px; 
  background: url(../img/more_btn2.png) no-repeat;
  background-size: 100% 100%;
  color: #fff;
  border: 0;
}
.div_one_div {
  margin-left: 15%;
  margin-top: 10%;
}